Table 1.

Results from different H₂-driven NADH generation experiments designed to evaluate specific operational parameters of the enzyme-modified particles

Entry	[NAD+] [mm]	Conversion [%]	Initial activity[a]	Total turnover number[b]
1	0.07	>97[c]	1.4±0.1	1250[c]
2	2.00	9.3[d]	7.8±0.5	53 100[d]
3	5.00	75[e]	N.D.	>94 800[e]

[a] Initial activity [μmol min⁻¹ per mg NAD⁺ reductase] measured during the initial linear reaction phase; [b] Total turnover number [moles of NADH generated per mole of NAD⁺ reductase exposed to the carbon particles]; [c] Measured after 30 min; [d] Measured at 35 min; [e] Measured at 20 h; N.D., not determined.